Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific
International audience This paper explores the three-way interactions between the Indian monsoon, the North Atlantic, and the tropical Pacific. Four climate records were analyzed: the monsoon rainfall in two Indian regions, the Southern Oscillation index for the tropical Pacific, and the NAO index f...
Published in: | Journal of Climate |
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Main Authors: | , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.archives-ouvertes.fr/hal-01099078 https://hal.archives-ouvertes.fr/hal-01099078/document https://hal.archives-ouvertes.fr/hal-01099078/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Oscillatory%20Climate%20Modes%20in%20the%20Indian%20Monsoon,%20North%20Atlantic,%20and%20Tropical%20Pacific.pdf https://doi.org/10.1175/JCLI-D-13-00105.1 |
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English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Feliks, Yizhak Groth, Andreas Ghil, Michael Robertson, Andrew W. Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience This paper explores the three-way interactions between the Indian monsoon, the North Atlantic, and the tropical Pacific. Four climate records were analyzed: the monsoon rainfall in two Indian regions, the Southern Oscillation index for the tropical Pacific, and the NAO index for the North Atlantic. The individual records exhibit highly significant oscillatory modes with spectral peaks at 7-8 yr and in the quasi-biennial and quasi-quadrennial bands.The interactions between the three regions were investigated in the light of the synchronization theory of chaotic oscillators. The theory was applied here by combining multichannel singular-spectrum analysis (M-SSA) with a recently introduced varimax rotation of the M-SSA eigenvectors.A key result is that the 7-8-yr and 2.7-yr oscillatory modes in all three regions are synchronized, at least in part. The energy-ratio analysis, as well as time-lag results, suggests that the NAO plays a leading role in the 7-8-yr mode. It was found therewith that the South Asian monsoon is not slaved to forcing from the equatorial Pacific, although it does interact strongly with it. The time-lag analysis pinpointed this to be the case in particular for the quasi-biennial oscillatory modes.Overall, these results confirm that the approach of synchronized oscillators, combined with varimax-rotated M-SSA, is a powerful tool in studying teleconnections between regional climate modes and that it helps identify the mechanisms that operate in various frequency bands. This approach should be readily applicable to ocean modes of variability and to the problems of air-sea interaction as well. |
author2 |
Department of Atmospheric and Oceanic Sciences Los Angeles (AOS) University of California Los Angeles (UCLA) University of California-University of California Institute of Geophysics and Planetary Physics Los Angeles (IGPP) CNRS, Dept Geosci, Paris, France Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC) Columbia Univ, Int Res Inst Climate & Soc, Palisades, NY USA |
format |
Article in Journal/Newspaper |
author |
Feliks, Yizhak Groth, Andreas Ghil, Michael Robertson, Andrew W. |
author_facet |
Feliks, Yizhak Groth, Andreas Ghil, Michael Robertson, Andrew W. |
author_sort |
Feliks, Yizhak |
title |
Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific |
title_short |
Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific |
title_full |
Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific |
title_fullStr |
Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific |
title_full_unstemmed |
Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific |
title_sort |
oscillatory climate modes in the indian monsoon, north atlantic, and tropical pacific |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.archives-ouvertes.fr/hal-01099078 https://hal.archives-ouvertes.fr/hal-01099078/document https://hal.archives-ouvertes.fr/hal-01099078/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Oscillatory%20Climate%20Modes%20in%20the%20Indian%20Monsoon,%20North%20Atlantic,%20and%20Tropical%20Pacific.pdf https://doi.org/10.1175/JCLI-D-13-00105.1 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.archives-ouvertes.fr/hal-01099078 Journal of Climate, American Meteorological Society, 2013, 26 (23), pp.9528-9544. ⟨10.1175/JCLI-D-13-00105.1⟩ |
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op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JCLI-D-13-00105.1 |
container_title |
Journal of Climate |
container_volume |
26 |
container_issue |
23 |
container_start_page |
9528 |
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9544 |
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ftccsdartic:oai:HAL:hal-01099078v1 2023-05-15T17:29:45+02:00 Oscillatory Climate Modes in the Indian Monsoon, North Atlantic, and Tropical Pacific Feliks, Yizhak Groth, Andreas Ghil, Michael Robertson, Andrew W. Department of Atmospheric and Oceanic Sciences Los Angeles (AOS) University of California Los Angeles (UCLA) University of California-University of California Institute of Geophysics and Planetary Physics Los Angeles (IGPP) CNRS, Dept Geosci, Paris, France Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC) Columbia Univ, Int Res Inst Climate & Soc, Palisades, NY USA 2013 https://hal.archives-ouvertes.fr/hal-01099078 https://hal.archives-ouvertes.fr/hal-01099078/document https://hal.archives-ouvertes.fr/hal-01099078/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Oscillatory%20Climate%20Modes%20in%20the%20Indian%20Monsoon,%20North%20Atlantic,%20and%20Tropical%20Pacific.pdf https://doi.org/10.1175/JCLI-D-13-00105.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-13-00105.1 hal-01099078 https://hal.archives-ouvertes.fr/hal-01099078 https://hal.archives-ouvertes.fr/hal-01099078/document https://hal.archives-ouvertes.fr/hal-01099078/file/%5B15200442%20-%20Journal%20of%20Climate%5D%20Oscillatory%20Climate%20Modes%20in%20the%20Indian%20Monsoon,%20North%20Atlantic,%20and%20Tropical%20Pacific.pdf doi:10.1175/JCLI-D-13-00105.1 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.archives-ouvertes.fr/hal-01099078 Journal of Climate, American Meteorological Society, 2013, 26 (23), pp.9528-9544. ⟨10.1175/JCLI-D-13-00105.1⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.1175/JCLI-D-13-00105.1 2021-11-20T23:36:21Z International audience This paper explores the three-way interactions between the Indian monsoon, the North Atlantic, and the tropical Pacific. Four climate records were analyzed: the monsoon rainfall in two Indian regions, the Southern Oscillation index for the tropical Pacific, and the NAO index for the North Atlantic. The individual records exhibit highly significant oscillatory modes with spectral peaks at 7-8 yr and in the quasi-biennial and quasi-quadrennial bands.The interactions between the three regions were investigated in the light of the synchronization theory of chaotic oscillators. The theory was applied here by combining multichannel singular-spectrum analysis (M-SSA) with a recently introduced varimax rotation of the M-SSA eigenvectors.A key result is that the 7-8-yr and 2.7-yr oscillatory modes in all three regions are synchronized, at least in part. The energy-ratio analysis, as well as time-lag results, suggests that the NAO plays a leading role in the 7-8-yr mode. It was found therewith that the South Asian monsoon is not slaved to forcing from the equatorial Pacific, although it does interact strongly with it. The time-lag analysis pinpointed this to be the case in particular for the quasi-biennial oscillatory modes.Overall, these results confirm that the approach of synchronized oscillators, combined with varimax-rotated M-SSA, is a powerful tool in studying teleconnections between regional climate modes and that it helps identify the mechanisms that operate in various frequency bands. This approach should be readily applicable to ocean modes of variability and to the problems of air-sea interaction as well. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Indian Pacific Journal of Climate 26 23 9528 9544 |